Convert square centimeters to square millimeters
1 cm² = 100 mm². Change the amount below, or read the formula and the reference table further down.
1 square centimeter equals
square millimeters
1 cm² = 100 mm²
The formula
Square centimeters and square millimeters both measure area from the same zero, so a single multiplier does the job.
mm² = cm² × 100
Going the other way? Convert square millimeters to square centimeters.
Square centimeters to square millimeters table
Common values, rounded for reading.
| Square centimeters (cm²) | Square millimeters (mm²) |
|---|---|
| 1 | 100 |
| 2 | 200 |
| 3 | 300 |
| 4 | 400 |
| 5 | 500 |
| 6 | 600 |
| 7 | 700 |
| 8 | 800 |
| 9 | 900 |
| 10 | 1,000 |
| 15 | 1,500 |
| 20 | 2,000 |
| 25 | 2,500 |
| 30 | 3,000 |
| 40 | 4,000 |
| 50 | 5,000 |
| 75 | 7,500 |
| 100 | 10,000 |
| 250 | 25,000 |
| 500 | 50,000 |
| 1,000 | 100,000 |
Questions people ask
- How many square millimeters are in a square centimeter?
- One square centimeter equals 100 square millimeters.
- How do I convert square centimeters to square millimeters by hand?
- Multiply the number of square centimeters by 100. For a rough check, 100 is close enough for most everyday use.
- What is 1 square centimeter in square millimeters?
- 1 square centimeter is 100 square millimeters.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.